Sash-lock.



G. J. ENGERT & R. D. BURNHAM.

SASE LOOK. ARI-NATION FILED MAR.17, 1909.

w wdww Wa v m m X G Aw W M W a UNITED STATES PATENT OFFICE.

GEORGE J. ENGER'I' AND ROL D. BURNI-IAM, OF SPOKANE, WASHINGTON.

SASH-LOGK.

To all whom it may concern:

Be it known that we, GEORGE J. ENGERT and Ron D. BURNHAM, citizens ofthe United States, residing at Spokane, in the county of Spokane andState of Washington, have invented certain new and useful Improvementsin Sash-Locks, of which the following is a specification.

This invention relates to window fastening devices and refersparticularly to one which is adapted to secure the sashes of a window ina locked position when the same are partially opened for ventilatingpurposes.

The invention aims to produce a window lock of this character which willsecure the sashes of the window in an open position and which at thesame time will prevent the entrance through the window from the outsideby preventing the tampering with the locking mechanism.

The invention further aims the provision of a device of this characterwhich may be applied to window sashes and devices of common formationand which will not detract from the appearance of the same, and onewhich is of simple construction and comprising few parts, therebyproducing a device which may be economically manufactured and readilyapplied.

Other objects and advantages of this invention will be further pointedout in the specification and appended claims in de scribing the novelarrangements, combinations and formations of the different elementswhich constitute the same.

For a full understanding of the invention reference is to be had tothefollowing description and accompanying drawings in which Figure 1 isa perspective view of the upper portion of a window casing disclosing asash mounted in the same and having the improved look mounted upon thesame. Fig. 2 is a perspective view of the lower portion of a windowcasing disclosing the lock as applied to a sash mounted in the same.Fig. 3 is a fragmentary vertical section through the lock, and Fig.4is adetailed perspective View of the plate and pawl actuating means carriedthereby.

Corresponding and like parts are referred to in the followin descriptionand indicated in all the views 0 the drawings by the same referencecharacters.

Referring to the drawings the numeral 10 Specification of LettersPatent.

Application filed. March 17, 1909.

Patented May 24, 1910. Serial No. 483,881.

designates the casing of a window in which the upper and lower sashes 11and 12 are mounted and adapted for slidable movement therein. The sashes11 and 12 are separated from one another and held in vertical alinementthrough the medium of a central guide 13 which is disposed within thewindow casing 10. Adjacent the upper end of and on the guide 13 a stripof metal 1 1 is longitudinally secured which is transversely crimped toform a plurality of equidistantly spaced shoulders 15 which are adaptedto receive the outer end of a pawl 16 carried upon the upper sash 11.The shoulders 15 are formed with inclined faces 17 immediately beneaththe same which are adapted to guide the extremity of the pawl 16upwardly to engage with the shoulder 15 upon the raising of the sash 11in order to admit of the riding of the pawl 16 over the shoulders 15.The pawl is mounted in a casing having oppositely disposed attachingears 18 and provided with inturned flanges 19 and 20, the flanges beingextended into a recessed portion formed in the side of the sash 11adjacent the guide 18 to form a housing in conjunction with the plate18. The flanges 19 and 20 are provided with a pin 21 which istransversely disposed between the same and which supports an inner plate22 in pivotal engagement between the flanges 19 and 20. The plate 22 isprovided with outturned lugs 23 which are apertured and through which ispassed the pin 21 for the purpose of supporting the plate 22. The outerextremity of the plate 22 carries the pawl 16 which extends beyond thesame and is curved upwardly beyond the lower edge of the plate 18 toengage with shoulders 15. A suitable spring 24, as for instance a coilspring, as is disclosed in the drawings, is disposed between the innerend of the plate 22 and the inner face of the plate 18 to normally holdthe inner end of the plate 22 away from the plate 18 and therebytensionally retain the pawl 16 against the shoulders 15. The plate 22 isprovided adjacent its opposite edge with an outwardly extended arm 25upon which is mounted a stud 26 engaged through an aperture formed inthe plate 18 and adapted to be engaged between the finger of theoperator. The lower sash 12 is likewise provided with a locking meanswhich operates with a shouldered strip positioned upon the inner face ofthe casing 10 adjacent the inner edge of the sash 12 and is alsopositioned so as to dispose the shoulders in a downward direction toprevent the raising of the sash 12 without retracting the pawl 16therefrom. It is readily understood that a device of this character maybe applied to any adaptable device where a lock ing means of this natureis desired where it is effectual in use, the purpose of this in ventionbeing to provide a fastening means which may be operated from one sideonly, the member supporting the catch of the same serving to guard thecatch.-

The strip 14 in which the shoulders 15 are formed is extended only ashort distance lengthwise of the guide 13 in order to adjust the lockingof the sash 11 within a limited range so as to admit of the drawingdownwardly of the same to a slight degree and retain the sash in suchposition, the small opening between the sash in the casing not enablinga person from the outside of the window to engage the arm through theopen iang and to thereby release the locking mem- Attention is herecalled to the fact that the attaching ears 18 are offset with respect toone of the flanges 19 of the casing so as to form oppositelydisposedshoulders, the free end of the pawl being extended between theedge of one of the attaching ears and the adj acent flange 19 andadapted to bear against the adjacent shoulder for limiting the tiltingmovement of the pawl. By having the attaching ears 18 offset withrespect to one of the flanges 19, the casing may be readily attached toone side of the sash so as to permit the free end of the pawl to extendbeneath the guiding strip for engagement with the teeth on the rack. Itwill here be noted that the rack and terminal lip of the pawl areentirely housed by the guiding strip so as to prevent the teeth on therack from catching in any obstructions and also to present a neatappearance.

Having thus described the invention what is claimed as new is 1. Thecombination with a window frame, including a guide strip, of a sashslidably mounted in the frame, a rack secured to one side of the guidestrip and facing the sliding sash, a casing secured to the inner face ofthe sash and comprising a body portion having oppositely disposedattaching ears and provided with a lateral extension arranged at therear of-the rack, said casing being provided with flanges, one of whichis disposed at one side of the casing, and the other at said extension,a pawl pivotally mounted between the flanges and having one end thereofbifurcated to produce spaced fingers, one of which is bent laterallybeyond the adjacent end of the extension and constitutes a terminal lipfor engagement with the teeth on the rack, a knob secured to the otherfinger and projecting through an opening in the casing, and a springinterposed between the upper end of the pawl and the adjacent face ofthe casing for normally and yieldably supporting the free end of the lipin engagement with the. teeth on the rack, said rack and lip beinghoused by the guide stri 2 As a new article of manufacture, a sash lockcomprising a casing stamped from a single piece of metal and providedwith oppositely disposed perforated attaching ears, the metal on oneside of theplate and be tween said attaching ears beingprojectedlaterally to form an extension, one end of which is bent inwardly toproduce a flange, the metal at the opposite side of the plate being bentinwardly to produce a similar flange, there being an opening formed inthe body of the plate near one of the attaching cars, a spring pressedpawl pivotally mounted between the flanges and having one end thereofbifurcated to form spaced fingers, one of which is curved laterallybeyond 1 the adjacent end of the extension to form a terminal lip, and aknob secured to the other finger and projecting through the opening inthe casing.

In testimony whereof we afiix our signatures in presence of twowitnesses.

GEORGE J. ENGERT. [Ls] ROL D. BURNHAM. [L.s.]

WVitnesses A. MARTIN, DAVID HERMAN.

